We have some posts about the Japanese machines:
http://www.quiltingboard.com/vintage...s-t207877.html
http://www.quiltingboard.com/vintage...s-t207880.html
http://www.quiltingboard.com/picture...p-t164361.html
You do not have a picture but maybe the info on one of those will be helpful.
I have trouble finding info on White machines, too. I haven't seen an old one I hated yet though.